Temperatures in the UK will feel significantly cooler from Sunday and into next week as the mercury dips to below-average levels - albeit the bright weather is expected to remain for the time being, according to forecasts.

The lovely weather will continue for most of the UK today and tomorrow, with highs of 22C (72F) forecast in the South East, before the warmth begins to fade on Saturday, with highs of 18C (64F) - and then 16C (61F) on Sunday.

Rainfall and thunderstorms will appear this week
INDIA-WEATHER-RAIN
(Photo : DIBYANGSHU SARKAR/AFP via Getty Images)

Thunderstorms featuring lightning, downpours, and even hail have battered parts of the UK in recent days, as per Express.

On Tuesday, hail and lightning rocked London, causing alarms to go off.

British Weather Services forecaster Jim Dale cautioned that higher temperatures may be on their way out.

When asked about the weather forecast for the Jubilee bank holiday weekend, the meteorologist described it as "on a knife-edge."

While the north and Scotland have been cautioned about rain, the Met Office predicted "above-average temperatures" in the south and southeast.

As a result, the North Atlantic pressures will bring more days of rain and chilly temperatures to the country.

Netweather has released a storm forecast, especially for the country's northern regions.

Storms will proceed east across the Shetland Islands towards Norway on Thursday, according to the forecast.

Showers and storms will be most common across western and northern Scotland, with the potential of hail, gusty gusts, and isolated floods.

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Temperatures will plummet this weekend

Despite the brightness, weather in London might be considerably colder on Sunday, with just 14C (57F) anticipated well below the average May temperature in England, which is 16C (61F).

Looking ahead to next week, highs of 16C (61F) are expected on Monday before gradually rising to roughly 20C (68F) by Wednesday and remaining there for the remainder of the week.

This morning saw early bright periods in the south, but also dense clouds bringing rain to Northern Ireland, southern Scotland, and northern England, which will gradually track southwards later and become light and patchy.

Saturday will be a lovely, dry, and bright day with long periods of sunshine, but patchy cloud cover may form at times.

On Sunday, there will be some sunshine, but clouds will rise in from the east, bringing a possibility of showers.

Forecasters said that there is still lots of detail to be determined for next week, with conditions relying on how the highly pressurized system moves in the late weekend and details still relatively unknown.

The Met Office predicts a "continuing mixed picture" for next week, with a mix of dry and rainy periods and usually low winds, with temperatures forecast to be "near-average." 

This weekend will see things quiet down for most of the UK at first said Deputy Chief Meteorologist Dan Rudman, as per Dailymail.

There will be lots of sunlight, and temperatures in the south might reach 21 degrees Celsius (70 degrees Fahrenheit) on Saturday.

Sunday will be colder and cloudier.

There's a lot to figure out in the forecast for next week, but early signs point to a mix of sunshine and a few showers, with near-average temperatures for the most part.

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